Earth, Air, Fire, Water – and Spirit their abiding fifth, for all who are play the fool: all believe they're righteous.

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Notes

1."Thus into darkness fell this star" - modified "The Fall of Gil-Galad."

2. "All who are play the fool: all believe they're righteous" - Joss Whedon attributes this to William Dafoe (well, slightly differently phrased) by way of explaining that every character believes he is the hero of the story.